. good quality pitch pine was not obtain ##able in the lengths required . douglas fir was obtain ##able in such lengths but was discount ##ed on strength and du ##ra ##bility grounds . a douglas fir stock on a nearby mill had rot ##ted after only seven years . thus it was decided that lam ##inated stocks would be made . the 52 feet ( 15 @ . @ 85 m ) long stocks were made from douglas fir . all timber had been pressure treated with pre ##ser ##vati ##ve and well seasoned . it was estimated that a lam ##inated stock would be up to 20 % stronger than a similar stock of solid timber . the timber used was 1 1 ⁄ 2 inches
. good quality pitch pine was not obtainable in the lengths required. douglas fir was obtainable in such lengths but was discounted on strength and durability grounds. a douglas fir stock on a nearby mill had rotted after only seven years. thus it was decided that laminated stocks would be made. the 52 feet ( 15 @. @ 85 m ) long stocks were made from douglas fir. all timber had been pressure treated with preservative and well seasoned. it was estimated that a laminated stock would be up to 20 % stronger than a similar stock of solid timber. the timber used was 1 1 ⁄ 2 inches